Geoengineering Info Profile picture
Apr 29, 2023 7 tweets 6 min read Read on X
🚨PAPER🚨

#DAC of CO2 from the atm. is being explored as a tech. that can contribute to the goal of reaching #NetZero CO2 emissions.

A new study led by @DonglongFu1 showed that the use of zeolitic materials are feasible for DAC when it is integrated with H2O harvesting.
🧵
1/7 Image
"A combination of a commercially available desiccant, AQSOA-Z02A, and a mordenite-type zeolite (MOR) enables
continuous operation of a designed #DAC system comprised of two
parallel units with a regeneration temperature of 100°C," research finds.
2/7 Image
Furthermore, "the system
using pure #zeolite alone requires regeneration at temperatures between 200°C and 300°C."
3/7 ImageImage
"Techno-economic analyses of 12 process
scenarios reveal that the energy requirement of the best scenario
investigated is 71 GJ/tCO2, while the conventional pure zeolitebased system requires 200 GJ/tCO2."
#DAC
4/7 Image
Research declared that, "the optimized system gives a
cost between $246 and $568 per ton CO2 #captured, depending on
the energy costs, while system operates at sub-0°C temperatures or with
integration of water harvesting, respectively."
#DAC
5/7 ImageImage
📖 Read open-access study performed by @DonglongFu1 & Mark Devis funded by @Caltech entitled: "Toward the feasible direct air capture of
carbon dioxide with molecular sieves by water
management," here ⬇️
cell.com/cell-reports-p…

#DirectAirCapture
#CarbonDioxideRemoval

6/7

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More from @geoengineering1

Jul 15
🚨🗓Carbon Removal Events🗓🚨

Here's a list of what's coming up this week (08 July - 21 July 2025) in the field of #CarbonDioxideRemoval:

🔗:

🧵1/17 teamup.com/kshqbfhrqkw36s…Image
EVENT—This is CDR: Divert, Transform, Apply – How BioForceTech is Removing CO2 by Turning Wastewater Sludge into Aggregate by @openaircollect

🗓15 July 2025 | Online
🔗

2/17lu.ma/4mr8gbc9
EVENT—What’s Hot in Carbon Removal – A Peek into the Future of Climate Tech by @airminers

🗓15 July 2025 | Online
🔗

3/17lu.ma/qcfpipnt
Read 18 tweets
Jul 13
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (07-13 July 2025):

🔗:

🧵0/23
Frontier signed a $41M deal with Arbor for 116,000 tCO₂ removals (2028–2030).

1/23
frontierclimate.com/writing/arbor
Five UK cement & lime firms raised £60M to build the world’s largest cement CCS plant, creating 12,500 jobs.

2/23
constructionenquirer.com/2025/07/07/60m…
Read 25 tweets
Jul 11
🚨Georgia Tech researchers have developed a low-cost method to pull CO₂ from the air (#DAC) using cold temperatures and common materials, potentially slashing capture costs to ~$70 per ton and expanding where Direct Air Capture can work. #CDR

DETAILS🧵1/9 Image
2/ DAC is a critical tool for fighting climate change, but it’s been too expensive to scale.

Current systems often exceed $200 per ton of CO₂ captured, partly due to the high energy needed to run them.
3/ The Georgia Tech team found a smart way to tap into existing industrial cold from liquefied natural gas (LNG) terminals.

When LNG is regasified for use, huge amounts of cold energy are wasted (energy that can chill air for better CO₂ capture).
Read 10 tweets
Jul 9
🚨From Air to Stone🚨

New study revealed that Kenyan fig trees can literally turn parts of themselves to stone, using microbes to convert internal crystals into limestone-like deposits that lock away CO2, sweeten surrounding soil & still yield fruit. #CarbonRemoval

DETAILS🧵1/8 Image
2/ Some Kenyan fig trees, like Ficus wakefieldii, store CO₂ not just as organic matter (wood/leaves) but also as calcium carbonate (CaCO₃) - the same mineral as chalk or limestone.

This process is called the oxalate-carbonate pathway (OCP).
3/ PROCESS:

First, the tree forms calcium oxalate crystals inside its wood.

Then, special microbes (oxalotrophic microorganisms) or fungi convert these crystals into CaCO₃.

This locks up carbon in mineral form that can persist in soil far longer than organic carbon. Image
Read 9 tweets
Jul 8
🚨🗓Carbon Removal Events🗓🚨

Here's a list of what's coming up this week (08 July - 14 July 2025) in the field of #CarbonDioxideRemoval:

🔗:

🧵1/15 teamup.com/kshqbfhrqkw36s…Image
EVENT—5th Brazilian Congress of Remineralizers Conference

🗓8-11 July 2025 | Brazil
🔗

2/15remineralize.org/2025/01/5th-br…
EVENT—Can Germany lead the way on CDR Policy? by CDR Policy Scoop

🗓09 July 2025 | Online
🔗

3/15linkedin.com/events/cangerm…
Read 16 tweets
Jul 6
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (30 June - 06 July 2025):

🔗:

🧵0/19
@Climeworks raised $162 million Series E to scale Generation‑3 direct air capture, cut costs to $400–600/t, and grow its carbon removal portfolio.

1/19
climeworks.com/press-release/…
Terra CO2 secured $124.5 million Series B to build commercial low-carbon cement facilities.

2/19
esgtoday.com/low-carbon-bui…
Read 22 tweets

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